* [PATCH] snd-usb-us122l: Fix MIDI output
@ 2011-01-03 1:41 Karsten Wiese
2011-01-11 18:49 ` Takashi Iwai
0 siblings, 1 reply; 2+ messages in thread
From: Karsten Wiese @ 2011-01-03 1:41 UTC (permalink / raw)
To: alsa-devel
The US-122L always reads 9 bytes per urb unless they are set to 0xFD.
Signed-off-by: Karsten Wiese <fzu@wemgehoertderstaat.de>
Cc: stable@kernel.org
---
sound/usb/midi.c | 11 +++++++++--
1 files changed, 9 insertions(+), 2 deletions(-)
diff --git a/sound/usb/midi.c b/sound/usb/midi.c
index 25bce7e..b1f9ec9 100644
--- a/sound/usb/midi.c
+++ b/sound/usb/midi.c
@@ -850,8 +850,8 @@ static void snd_usbmidi_us122l_output(struct snd_usb_midi_out_endpoint *ep,
return;
}
- memset(urb->transfer_buffer + count, 0xFD, 9 - count);
- urb->transfer_buffer_length = count;
+ memset(urb->transfer_buffer + count, 0xFD, ep->max_transfer - count);
+ urb->transfer_buffer_length = ep->max_transfer;
}
static struct usb_protocol_ops snd_usbmidi_122l_ops = {
@@ -1295,6 +1295,13 @@ static int snd_usbmidi_out_endpoint_create(struct snd_usb_midi* umidi,
case USB_ID(0x1a86, 0x752d): /* QinHeng CH345 "USB2.0-MIDI" */
ep->max_transfer = 4;
break;
+ /*
+ * Some devices only work with 9 bytes packet size:
+ */
+ case USB_ID(0x0644, 0x800E): /* Tascam US-122L */
+ case USB_ID(0x0644, 0x800F): /* Tascam US-144 */
+ ep->max_transfer = 9;
+ break;
}
for (i = 0; i < OUTPUT_URBS; ++i) {
buffer = usb_alloc_coherent(umidi->dev,
--
1.7.2.3
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] snd-usb-us122l: Fix MIDI output
2011-01-03 1:41 [PATCH] snd-usb-us122l: Fix MIDI output Karsten Wiese
@ 2011-01-11 18:49 ` Takashi Iwai
0 siblings, 0 replies; 2+ messages in thread
From: Takashi Iwai @ 2011-01-11 18:49 UTC (permalink / raw)
To: Karsten Wiese; +Cc: alsa-devel
At Mon, 3 Jan 2011 02:41:58 +0100,
Karsten Wiese wrote:
>
>
> The US-122L always reads 9 bytes per urb unless they are set to 0xFD.
>
> Signed-off-by: Karsten Wiese <fzu@wemgehoertderstaat.de>
> Cc: stable@kernel.org
Applied now. Thanks.
Takashi
> ---
> sound/usb/midi.c | 11 +++++++++--
> 1 files changed, 9 insertions(+), 2 deletions(-)
>
> diff --git a/sound/usb/midi.c b/sound/usb/midi.c
> index 25bce7e..b1f9ec9 100644
> --- a/sound/usb/midi.c
> +++ b/sound/usb/midi.c
> @@ -850,8 +850,8 @@ static void snd_usbmidi_us122l_output(struct snd_usb_midi_out_endpoint *ep,
> return;
> }
>
> - memset(urb->transfer_buffer + count, 0xFD, 9 - count);
> - urb->transfer_buffer_length = count;
> + memset(urb->transfer_buffer + count, 0xFD, ep->max_transfer - count);
> + urb->transfer_buffer_length = ep->max_transfer;
> }
>
> static struct usb_protocol_ops snd_usbmidi_122l_ops = {
> @@ -1295,6 +1295,13 @@ static int snd_usbmidi_out_endpoint_create(struct snd_usb_midi* umidi,
> case USB_ID(0x1a86, 0x752d): /* QinHeng CH345 "USB2.0-MIDI" */
> ep->max_transfer = 4;
> break;
> + /*
> + * Some devices only work with 9 bytes packet size:
> + */
> + case USB_ID(0x0644, 0x800E): /* Tascam US-122L */
> + case USB_ID(0x0644, 0x800F): /* Tascam US-144 */
> + ep->max_transfer = 9;
> + break;
> }
> for (i = 0; i < OUTPUT_URBS; ++i) {
> buffer = usb_alloc_coherent(umidi->dev,
> --
> 1.7.2.3
>
>
> _______________________________________________
> Alsa-devel mailing list
> Alsa-devel@alsa-project.org
> http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
>
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